As I start to do so serious thinking and reading about installing my Englander 28-3500 into my existing oil fired hot air furnace duct work, a few questions come to mind. I can’t find any direct answers so I thought I’d try here. My house is about 10 years old and therefore fairly tight. Hooking in the feed presents no problems, it’s the return air flow that puzzles me. The 28-3500 manual really doesn’t address the situation and I can’t find it in the forums - exactly. In one discussion, stoveguy2esw (Mike) mentioned he was concerned about the static pressure putting in a return line so that kind of tells me that normally you would not install a return line, hence the lack of a mention in the manuals. If no return line is the normal case, then, in a new, tight house, wouldn’t you create a partial vacuum in the basement as you are pushing air out of the basement but how is the air getting replaced in the basement? Wouldn’t that cause chimney draft problems or no draft at all and smoke in the room? The blower is rated at 850 cfm so it is substantial air movement. If we assume the air in the basement is being replaced via normal air leaks in the house going to the basement, then I’m going to be heating the basement which seems like a terrible waste. What am I missing? It seems like I need a return line to the stove.